unit 3

Question 1

When a person rubs their hands together it causes stored chemical energy to be transformed into mechanical energy. Due to the Law of Conservation of Energy some of the energy is also transformed into _______ energy.

Answer 1

thermal

Question 2

what form of energy is lightning?

Answer 2

electrical

Question 3

explain the energy transformation that takes place when a hairdryer is being used.

Answer 3

electric to mechanical

Question 4

describe the energy transformation that occurs as you use a bow and arrow.

Answer 4

(elastic)potential to kinetic. potential is in the bow stored as elastic potential which transfers as you release the arrow to kinetic energy.

Question 5

whats an example of kinetic energy?

Answer 5

a person running, a ball falling from a shelf.

Question 6

what type of energy is used to move a bicycle?

Answer 6

mechanical

Question 7

a rollercoaster stopped at the top of a hill illustrates what type of energy?

Answer 7

potential

Question 8

what type of energy is used to turn on a light switch?

Answer 8

mechanical

Question 9

give an example of an object increasing its potential energy.

Answer 9

potential energy increases because of position of mass. pulling further back on a rubber band would increase the potential energy.

Question 10

light is an example of what type of energy?

Answer 10

radiant

Question 11

what does the law of conservation state?

Answer 11

energy can be neither created nor destroyed. It can be transformed, but the total amount of energy is always the same.

Question 12

what type of energy transformation is solar panels charging a battery?

Answer 12

radiant to chemical

Question 13

give an example of electrical energy being converted to mechanical energy.

Answer 13

ceiling fan- the electrical switch is turned on and blades move

Question 14

what type of energy conversion occurs when logs burn in the campfire?

Answer 14

chemical to radiant and thermal

Question 15

why are chemical, nuclear, gravitational and elastic energies forms of potential energy?

Answer 15

because of energy in all of these forms is “stored” until it is used by transforming in another type.

Question 16

what is “energy in motion” called?

Answer 16

kinetic

Question 17

what is “stored energy” called?

Answer 17

potential energy

Question 18

A baseball player hits a fly ball. describe the energy conversion that occurs as the ball falls from a highest point.

Answer 18

at the highest point, the energy is all potential. The potential convert to kinetic as the ball falls before it touches the ground it becomes all kinetic , when it stops, it is potential again.

Question 19

digesting food performs what type of energy transformation?

Answer 19

chemical to mechanical

Question 20

in your own words, describe convection.

Answer 20

convection is heat transfer influences. This can be liquids or gases. The warmer particles rise, the cooler ones sink. The process continues to form a current.

Question 21

Colton got burned by touching a lighter he was using to start a campfire. how was the heat energy transferred from the letter to his hand?

Answer 21

conduction

Question 22

you get a sunburn after to be on the beach over fall break. what type of energy transfer is this?

Answer 22

radiation

Question 23

which term refers to the transfer of heat my electromagnetic waves?

Answer 23

radiation

Question 24

which term refers to the transfer of heat by direct contact?

Answer 24

conduction

Question 25

which term refers to the transfer of heat by the movement of a fluid?

Answer 25

convection

Question 26

heat always moves from ___________.

Answer 26

warmer to cooler

Question 27

a lizard basking in the morning sun is an example of:

Answer 27

radiation

Question 28

heating food up in the microwave is an example of:

Answer 28

radiation

Question 29

cooking pancake, using a stove top burner is an example of:

Answer 29

conduction

Question 30

blood circulation in warmer blooded animals is an example of:

Answer 30

convection

Question 31

A hot air balloon rising is an example of:

Answer 31

convection

Question 32

Ironing your clothes is an example of:

Answer 32

conduction

Question 33

heat and temperature are the same thing? true or false?

Answer 33

false

Question 34

all matter contains heat energy. true or false?

Answer 34

true

Question 35

Energy is the ability to do _____ or cause ________

Answer 35

work, change

Question 36

Energy exist in many forms and can be ______________ from one form to another.

Answer 36

transformed

Question 37

__________ energy is stored energy based on an objects _________ or ___________.

Answer 37

Potential position, condition

Question 38

The higher the ________ or the greater the ______ , the more potential energy an object has.

Answer 38

height mass

Question 39

_________ energy is the energy of _________.

Answer 39

Kinetic motion

Question 40

the faster an object moves or the more ______ it has, the greater its kinetic energy.

Answer 40

mass

Question 41

a ball at the top of a hill has ___________ energy.

Answer 41

potential

Question 42

a ball rolling down a hill has _______ energy.

Answer 42

kinetic

Question 43

he is transferred through direct ________ between objects.

Answer 43

contact

Question 44

A metal spool getting hot in a cup of soup is an example of:

Answer 44

conduction

Question 45

he is transferred by the movement of _______ or ______.

Answer 45

liquids gases

Question 46

boiling water in a pot is an example of:

Answer 46

convection

Question 47

heat is transferred through ________ waves and does not require a medium.

Answer 47

electromagnetic

Question 48

the sun warming the earth is an example of:

Answer 48

radiation

Question 49

________ energy is stored in bonds and released during chemical reactions.

Answer 49

chemical

Question 50

_______ powers a car as an example of chemical energy.

Answer 50

Gasoline

Question 51

__________ energy comes from the movement of charged particles.

Answer 51

Electrical

Question 52

a lamp plugged into an outlet is an example of what energy?

Answer 52

electrical.

Question 53

________ energy comes from the movent of particles within a substance.

Answer 53

thermal

Question 54

a pot heating on a stove is an example of what energy?

Answer 54

thermal

Question 55

________ energy travels in waves and can move through space.

Answer 55

radiant(light)

Question 56

__________ energy is the sum of kinetic energy and potential energy in a system.

Answer 56

mechanical

Question 57

a lamp transfers _______ energy into _____ and _______ energy.

Answer 57

electrical light, thermal

Question 58

photosynthesis transfers ________ energy into ______ energy in plants.

Answer 58

light chemical

Question 59

a rollercoaster transfers _________ energy into _______ energy as it moves.

Answer 59

potential kinetic energy

Question 60

When chocolate melts in the sun he is transferred by __________.

Answer 60

radiation